2015/05/31 by Witlef Wieczorek, S. Höfer, Sebastian G. Hofer +4
Engineering · Physics and Astronomy · #Advanced MEMS and NEMS Technologies #Algorithm #Computer science #Control (management) #Control theory (sociology) #Coupling (piping) #Filter (signal processing) #Force Microscopy Techniques and Applications #Kalman filter #Mechanical and Optical Resonators #Noise (video) #Physics #Spurious relationship #State (computer science) #Statistical physics #quant-ph
paper · pdf · doi:10.1103/physrevlett.114.223601
published as Phys. Rev. Lett. 114, 223601 (2015) · replaced with published version, 5+12 pages
openalex publication_date 2015/06/04 · arxiv created 2015/06/10 · arxiv updated 2015/06/11 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
We demonstrate optimal state estimation for a cavity optomechanical system through Kalman filtering. By taking into account nontrivial experimental noise sources, such as colored laser noise and spurious mechanical modes, we implement a realistic state-space model. This allows us to obtain the conditional system state, i.e., conditioned on previous measurements, with a minimal least-squares estimation error. We apply this method to estimate the mechanical state, as well as optomechanical correlations both in the weak and strong coupling regime. The application of the Kalman filter is an important next step for achieving real-time optimal (classical and quantum) control of cavity optomechanical systems.